新型槽肋结构液冷板性能研究及全CFD模型优化  

Performance study and full CFD model optimization of a new liquid-cooled plate with a rib-grooved structure

作　　者：朱佳慧 王俊博 毛佳妮 Zhu Jiahui;Wang Junbo;Mao Jiani(College of Metrology and Measurement Engineering,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]中国计量大学计量测试工程学院,杭州310018

出　　处：《低温与超导》2024年第2期60-67,共8页Cryogenics and Superconductivity

基　　金：浙江省自然科学基金(LGF21E080011)资助。

摘　　要：为了提升动力电池热管理性能,本文提出了一种以离散、倾斜和交替排列为分布特征的槽肋结构液冷板,其中槽结构用于强化冷却液和内壁面换热,肋结构用于引导流体流动并支撑流道空间。以方形锂离子电池组为研究对象,利用Comsol建立传热流动仿真模型开展数值模拟研究。结果表明,槽结构可使液冷板内部形成纵向旋流提升换热能力,肋结构可有效均衡流量分布提升温度均匀性,相比传统直流道液冷板,新型液冷板的电池组最高温度和接触面温度标准差分别下降了1.04℃和0.4336℃,进出口压差则仅增加7.8 Pa。此外,本文将液冷板内部划分为棋盘式空间,采用全CFD模型结合单目标遗传算法获得槽肋单元在液冷板中的最优分布,相比初始方案,优化后电池组最高温度仅增加了1%,但温度标准差和压差分别下降了33%和9%,具有优异的综合性能。In order to improve the thermal management performance of the power battery.Aliquid-cooled plate with a rib-grooved structure characterized by discrete,tilted and alternating arrangements was proposed,in which the groove structure is used to strengthen the heat transfer between the coolant and the inner wall surface,and the rib structure is used to guide the fluid flow and to support the flow channel space.Taking the square lithium-ion battery pack as the research object.Comsol was used to establish a heat transfer flow simulation model to carry out numerical simulation research.The results show that the grooves can make the liquid-cooled plate form a longitudinal cyclone to enhance the heat transfer,and the ribs can effectively balance the flow distribution to enhance the temperature uniformity.Compared with the traditional liquid-cooled plate,the maximum temper⁃ature of the battery pack and the standard deviation of the contact surface temperature of the new liquid-cooled plate are de⁃creased by 1.04℃and 0.4336℃,and the pressure difference between the inlet and outlet is increased by 7.8 Pa only.In ad⁃dition,this paper divides the liquid-cooled plate into a checkerboard space,and adopts a full CFD model combined with a sin⁃gle-objective genetic algorithm to obtain the optimal distribution of the ribs and grooves in the liquid-cooled plate.Compared with the initial scheme,the maximum temperature increases by only 1%,but the standard deviation of temperature and differenti⁃al pressure decrease by 33%and 9%,respectively,which provides an excellent comprehensive performance.

关 键 词：动力电池 液冷板 全CFD模型 纵向旋流 单目标遗传算法 

分 类 号：TB69[一般工业技术—制冷工程] U469.72[机械工程—车辆工程]